# MeTool

> MeTool is a free online tools platform offering 111+ browser-based utilities for image processing, video editing, document conversion, developer tools, 3D modeling, and online games. All processing happens locally in the browser — no uploads, no servers, zero privacy risk.

- Privacy-first: All tools process data locally using WebAssembly, Canvas API, and Web Workers
- No account required, completely free, no usage limits
- Supports English and Chinese (中文)
- Website: https://metool.online

## Image Tools

- [Online Image Compression Free · Shrink JPG PNG WebP Up to 70% Instantly](https://metool.online/images/compress/): 50MB image to 5MB in one click, quality unchanged. JPG, PNG, WebP - all formats supported. Batch processing, local compression, zero privacy concerns.
- [Online Image Format Converter · JPG PNG WebP AVIF Free Conversion](https://metool.online/images/imageFormatConvert/): Support JPG, PNG, WebP, AVIF and other mainstream image format conversion. Batch processing, high quality output, completely free. Privacy protection with local processing without server upload.
- [Image Resize Tool Online Free · Smart Scaling, Crop & Batch Processing](https://metool.online/images/resize/): Professional image resizing tool supporting smart scaling, cropping, stretching and other modes. Lock aspect ratio, maintain image quality, suitable for avatar creation, website optimization and other scenarios.
- [Whiteboard & Sketch Tool Free Online · Draw Diagrams, Annotate, Share Instantly](https://metool.online/images/sketchBoard/): Free online whiteboard — no install, no sign-up. Draw with pen, shapes (rect, circle, triangle, arrow), and multi-line text with adjustable font and size. Infinite canvas with pan & zoom. 4 background styles, undo/redo, export PNG or copy to clipboard. Perfect for flowcharts, sketches, annotations and quick idea sharing on desktop or mobile.
- [AI Remove Background & Global ID Photo Maker · US Passport · EU Visa · Japan Resume · China 1-inch — Free Online](https://metool.online/images/removeBackground/): AI one-click background removal with 12-country ID photo presets: US passport/visa 2×2in, UK/EU/Schengen 35×45mm, Japan resume & driver's license, Korea ARC, Canada passport 50×70mm, India Aadhaar, China 1-inch/2-inch/ID card, and more. Swap blue/red/white backgrounds, drag to position, export print-ready photos. 100% local AI processing.
- [Invisible Watermark Blind Watermark Generator · Hidden Watermarks](https://metool.online/images/blindWatermark/): Add invisible watermarks to images that the eye can't see — protect against theft and trace unauthorized sharing. Two modes: hide custom text, or add a rotation/scaling-proof password fingerprint. Batch processing, password protection, one-click verification. Images never leave your browser.
- [Image Watermark Tool Online · Add Text or Image Watermark, Adjust Opacity & Angle](https://metool.online/images/watermark/): Free online image watermark tool. Add text or image watermarks with adjustable opacity, size, angle, and tiling. 100% browser processing.
- [Online QR Code Generator · Custom Colors, Logo Embed, One-Click Download](https://metool.online/images/qrCodeGenerate/): Turn links, WiFi, business cards into QR codes. Free color, style, and logo customization. Perfect for marketing, events, brand display - generate in seconds.
- [Bead Pattern Maker · Convert Images to MARD Bead Patterns with Color Codes](https://metool.online/images/pindou/): Turn any image into a bead pattern instantly. Built-in MARD 221 standard colors aligned with 24/48/72/96/120/221 color kits — exported codes match your beads exactly. Brush editing, bead stats, 100% browser processing.
- [Images to PDF Free Online · Merge Multiple Photos into One PDF](https://metool.online/images/imagesToPdf/): Free online image to PDF converter. Upload multiple JPG/PNG/WebP images, set page size and margins, and merge them into a single PDF in seconds. All processed locally in your browser — no uploads, fully private.
- [Image to Base64 Converter Free Online · Generate Data URL, One-Click Copy](https://metool.online/images/imageToBase64/): Free online image to Base64 converter. Upload JPG, PNG, WebP, GIF and more to generate a Data URL or pure Base64 string. One-click copy, ready to embed in CSS / HTML / JSON. All processed locally in your browser.
- [Long Image Splitter Online Free · Split by Height or Custom Cut Lines](https://metool.online/images/longImageSplit/): Long image splitter with fixed-height and custom split line modes. Click to add lines, drag to adjust — precisely separate QR codes and button areas. Perfect for WeChat article images, comic pagination, long screenshot segmentation.
- [iPhone Long Image Stitcher · Smart Overlap Removal & Seamless Merge](https://metool.online/images/iphoneLongImageStitch/): Professional iPhone long image stitching tool that auto-detects overlapping regions and intelligently removes duplicates, combining multiple screenshots into one seamless long image. Uses first image width as baseline, perfectly solving iPhone's inability to scroll screenshot.
- [Screenshot Stitch & Overlap Remover · Auto Remove Duplicate Areas](https://metool.online/images/screenshotStitch/): Smart screenshot stitching tool that auto-detects and removes overlapping areas (status bars, nav bars, duplicate content) between consecutive screenshots, creating one clean seamless long image. Works with any device screenshots.
- [Movie Subtitle Image Stitcher · Online Preview & Stitch Movie Subtitle Strips](https://metool.online/images/movieSubtitleCrop/): Crop subtitle bands from movie or TV screenshots and stack them into one vertical long image. Drag anchors on the first frame, align row order with per-segment previews, preview the full stitch, then download—all in your browser. Great for language study, dialogue archives, and meme frames.
- [iOS App Icon & Screenshot Generator · Generate All iPhone iPad Apple Watch Sizes](https://metool.online/images/resizeIosAppDistribution/): Free online iOS app icon and screenshot size generator. Upload one image, instantly generate all iPhone, iPad, Apple Watch sizes following Apple's official App Store specs. Smart matching, batch processing, multiple resize modes. Essential tool for indie iOS developers.

## Document Tools

- [Markdown to WeChat Article Formatter · Free Online Tool with Themes & Code Highlighting](https://metool.online/docs/mdToWeixinArtical/): Free online Markdown to WeChat Official Account article converter. One-click conversion to WeChat-compatible rich text with syntax highlighting, table styling, and multiple themes. Supports local image upload: local image paths in Markdown are auto-detected, uploaded and stored in browser IndexedDB; also supports ZIP / folder batch import. 100% browser-local processing — your content never leaves your device.
- [Markdown to Xiaohongshu Cards Generator · Free Online Knowledge Card Maker](https://metool.online/docs/mdToXiaohongshu/): Free online Markdown to Xiaohongshu (Little Red Book) knowledge card generator. Auto-pagination, multiple beautiful themes, 3:5 and 1:1 ratios, HD PNG export. Turn tech articles, book notes, and study summaries into viral Xiaohongshu visual posts. 100% browser-local, no upload needed.
- [Markdown to PDF / Image / HTML / Word — Free Online Converter](https://metool.online/docs/markdownConvert/): Free online Markdown converter: export .md files to PDF, PNG, JPG, WebP, HTML, and Word (DOCX) in seconds. Syntax highlighting, tables, task lists, light/dark themes, smart PDF pagination. 100% browser-local — your files never leave your device.
- [PDF to Image Converter Free Online · Export Each Page as JPG or PNG](https://metool.online/docs/pdfToImages/): Free online PDF to image converter. Export every PDF page as a high-quality JPG or PNG. 1×/2×/3× render resolution, batch export as ZIP. All processed locally in your browser — no uploads, fully private.
- [Compress PDF Online Free · Shrink Scanned & Image PDFs in Browser](https://metool.online/docs/pdfCompress/): Free online PDF compressor — exceptionally effective for image-heavy and scanned PDFs, often shrinking multi-MB scans to 10%-30% of original size. Two-stage smart compression, 100% browser-local, no uploads.
- [PDF Merge & Split · Combine PDFs & Split by Page Range Free Online](https://metool.online/docs/pdfTools/): Free online PDF merge and split tool. Combine multiple PDFs with drag-to-reorder, or split by page ranges into separate files. 100% browser-local processing — no uploads, full privacy.
- [Word to PDF Free Online Converter · One-Click Convert, Perfect Layout Preserved](https://metool.online/docs/wordToPDF/): Convert Word to PDF instantly, preserving layouts, fonts, and images perfectly. No software needed, convert directly in your browser. Secure and reliable - your documents never touch our servers.
- [Word to Image Free Online · Export Full DOCX as JPG/PNG Locally](https://metool.online/docs/wordToImages/): Free online Word to long-image converter. Batch-upload .docx files and export each as a high-quality JPG or PNG long image, with ZIP download. 1×/2×/3× render scales. 100% browser-local — no uploads, full privacy.
- [PowerPoint to Image Converter Free Online · Export Slides as JPG or PNG](https://metool.online/docs/pptToImages/): Free online PowerPoint to image converter. Export every slide as a high-quality JPG or PNG. 1×/2×/3× render resolution, batch export as ZIP. All processed locally in your browser — no uploads, fully private.

## Markdown Tools

- [Markdown Online Editor Free & .md File Viewer — Live Preview, Auto-Save](https://metool.online/markdown/edit/): Don't know how to open a .md file? Drop it in your browser to view and edit instantly. Online Markdown editor with live side-by-side preview, code highlighting, image upload, and dark mode. Drafts auto-save locally — 100% private.
- [Mermaid Flowchart Online Editor & Preview · Flowchart Sequence Class ER Gantt Diagram Online](https://metool.online/markdown/mermaid/): Online Mermaid diagram editor with real-time preview. Type Mermaid syntax and instantly render flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, and pie charts. Export as SVG or PNG. Runs entirely in your browser — code never leaves your device.
- [LaTeX Formula Editor Online -  Real-time Render & Export](https://metool.online/markdown/latex/): Online LaTeX formula editor with real-time preview. Insert Greek letters, integrals, matrices with one click. Export to SVG/PNG. Runs entirely in browser — no data upload.
- [HTML to Markdown Converter · Paste & Convert HTML to Clean .md](https://metool.online/markdown/fromHtml/): Paste any HTML — copied from a webpage, WeChat article, blog post or rich-text editor — and convert it to clean, GFM-flavored Markdown. Smart cleanup of inline styles, tables, code blocks, blockquotes and images. Runs 100% in your browser; nothing is uploaded.
- [Markdown Format Checker & Auto-Fix · Fix Markdown Errors Online](https://metool.online/markdown/lint/): Paste or import Markdown and auto-fix formatting errors in one click — missing spaces after # headings, trailing spaces, inconsistent list numbering, missing blank lines, and more. Powered by markdownlint, runs entirely in your browser.
- [Share Markdown Preview — Generate a {0}-Day Link Instantly](https://metool.online/markdown/share/): Paste your Markdown document and generate a shareable preview link. Recipients see the full rendered layout without installing anything. Links expire automatically after {0} days. Data stays in your browser.
- [Markdown to PDF / Word / Image Online Free — Convert .md with Chinese & Code Highlight](https://metool.online/markdown/convert/): Free online converter: turn Markdown / .md files into PDF, Word (.docx), or images (PNG/JPG). Chinese fonts, syntax highlighting, tables and task lists preserved. Smart PDF pagination never clips content. No Pandoc, no install — 100% browser-based, files never uploaded.
- [Markdown to WeChat Article — Publish from Your .md Source](https://metool.online/markdown/wechat/): For Markdown writers who already draft in Obsidian, VSCode, or Typora: paste your .md, see a true WeChat-style live preview, copy and paste into the WeChat editor with all formatting preserved. Supports local image uploads: images referenced in your Markdown are detected automatically, uploaded and stored in browser IndexedDB (persists across page reloads), or import a ZIP / folder to batch-import images. Code highlighting, blockquotes, tables — all rendered the way WeChat displays them.
- [Markdown to Xiaohongshu Cards — Slice Long Notes Into Image Carousels](https://metool.online/markdown/xiaohongshu/): Turn a Markdown note (tech blog, study notes, knowledge digest) into a multi-card Xiaohongshu carousel. Auto-splits by H2 headings or `---` dividers, renders as 3:4 / 4:5 image cards with multiple themes designed for the Markdown-writer audience.

## Developer Tools

- [Free Online JSON Formatter & Beautifier · Validate, Compress, Edit JSON](https://metool.online/dev/jsonBeautify/): Free online JSON formatter and beautifier tool. One-click format messy JSON data with syntax highlighting, auto-indent, error detection, expand/collapse, copy to clipboard. Essential developer tool for API debugging and config file viewing.
- [JSON Validator · Online JSON Syntax Checker, Error Locator & Auto Fixer](https://metool.online/dev/jsonValidator/): Professional JSON validation tool that pinpoints syntax errors by line and column number with intelligent fix suggestions. Supports auto-fix for common errors (trailing commas, single quotes, comments). Essential for debugging API responses and config files.
- [JSON YAML XML CSV TOML Converter · Free Online Data Format Converter](https://metool.online/dev/jsonConvert/): Free online data format converter supporting bidirectional conversion between JSON, YAML, XML, CSV, and TOML in any combination. Smart format detection, one-click conversion for API development, config migration, and data import/export.
- [Text & Code Diff Tool · Online Side-by-Side Comparison with Highlighted Changes](https://metool.online/dev/textDiff/): Free online text and code diff tool. Paste any two snippets — code, configs, or articles — and see line-by-line differences highlighted instantly. No Git required.
- [Regex Tester Online · Real-Time Regular Expression Debugger with Match Highlight](https://metool.online/dev/regexTest/): Professional online regex testing tool. Real-time match highlighting, g/i/m/s flags support, built-in common regex patterns. Essential debugging tool for frontend, backend, and data developers.
- [My IP Address & IP Lookup — Location, ISP, IP Type (Residential/Datacenter/VPN) & Map](https://metool.online/dev/ipLookup/): Free online IP lookup tool. See your public IP or query any IP for its location, ISP/ASN, IP type (Residential, Datacenter, VPN, Tor), timezone and coordinates — pinpointed on an interactive map. Four-tier API fallback for reliable results.
- [Transfer Files from Android to iPhone to Windows & Mac · Wireless Cross-Device Share](https://metool.online/dev/lanTransfer/): Need to send files between Android and iPhone, or Windows and Mac? Open this page on both devices on the same WiFi — no app install, no account needed. P2P encrypted transfer, files never touch a server. Works across Android, iOS, Windows, and macOS.
- [HTTP Request Tester](https://metool.online/dev/httpClient/): Need to test an API without installing Postman? Build GET/POST requests in your browser, generate live cURL / Python / Go snippets, and send directly to CORS-enabled endpoints. Requests go from your device — never through MeTool's servers.
- [Screen Wake Lock · How to Stop Auto-Sleep? Keep Screen On While AI Codes — No Sleep, Fullscreen Immersion](https://metool.online/dev/wakeLock/): Device keeps auto-sleeping? Keep this page visible and toggle on to prevent auto-sleep. Ideal for waiting on Cursor, Claude Code, or in-browser demos. Auto-off timer and AI coding video background included. Zero install — close the tab to restore normal sleep.
- [HTML Share AI-Generated Page · Preview & Send Claude/ChatGPT Webpages Instantly](https://metool.online/dev/htmlShare/): The new way to share AI output: render HTML from Claude, ChatGPT, or any AI and generate a {0}-day shareable link — no installs, viewable on any device. Richer than Markdown, easier to share than attachments.
- [How to Open .html Files? Online HTML Viewer & Live Preview · No Install](https://metool.online/dev/htmlPreview/): Not sure how to open or view an .html file? Drop it into your browser for instant rendering. Supports full HTML pages and fragments, mobile/tablet/desktop viewport switching, and screenshot export. Paste AI-generated HTML to preview it right away.
- [JWT Decoder Online · Parse Header & Payload Locally — Token Never Uploaded](https://metool.online/dev/jwtDecoder/): Free online JWT decoder. Parses Header and Payload entirely in your browser — converts iat/exp/nbf timestamps to human-readable time, flags expired tokens, and shows nested JSON claims. Your token never leaves your device.
- [Password Generator Online · Secure Random Strong Password, Custom Rules](https://metool.online/dev/passwordGenerator/): Free online password generator using cryptographically secure random numbers. Customize length, character sets, with strength indicator.
- [URL Encoder Decoder Tool Online · Free URL Encode Decode Special Characters](https://metool.online/dev/urlEncodeDecode/): Professional URL encoding and decoding tool supporting URL and URI component conversion. Handles special characters, Chinese characters and other URL parameters, ensuring correct URL format for web development and API debugging.
- [Base64 Encode Decode Tool · Online Base64 Encoder Decoder](https://metool.online/dev/base64/): Professional Base64 encoding and decoding tool supporting UTF-8 text and Base64 string conversion. Ideal for data transmission, API development, image embedding and more.
- [MD5/SHA1/SHA256/SHA512 Generator Online · Free Hash Calculator](https://metool.online/dev/hashGenerator/): Free online hash calculator supporting MD5, SHA-1, SHA-256, SHA-512. Compute hash for text or files, 100% browser processing.
- [Simplified ↔ Traditional Chinese Converter](https://metool.online/dev/zhConvert/): Need to convert Simplified to Taiwan Traditional Chinese? Smart word-level conversion automatically maps 软件→軟體, 出租车→計程車, and handles one-to-many character mappings. Runs entirely in your browser — no text is uploaded.
- [Unix Timestamp Converter Online · Epoch to Date, Date to Timestamp — Seconds & Milliseconds](https://metool.online/dev/timestampConverter/): Free online Unix timestamp converter: convert epoch seconds or milliseconds to human-readable date/time and back instantly. Auto-detects precision, supports 40+ timezones (UTC, UTC+8, Tokyo, New York…), batch conversion, and live current timestamp display. 100% browser-side — nothing uploaded.

## Video Tools

- [Free Online Video Compressor · Compress MP4/MOV Up to 80% — No Upload](https://metool.online/videos/compress/): Compress MP4, MOV, M4V videos online — up to 80% smaller, visually lossless. Browser-native WebCodecs hardware acceleration. Files never leave your device. No software install, no account. Perfect for email, messaging, social media.
- [MP4 / MOV / M4V Converter · Browser Hardware-Accelerated Format Conversion](https://metool.online/videos/formatConvert/): Convert between MP4, MOV, and M4V formats — browser-native WebCodecs hardware acceleration, no software needed, instant local conversion. iPhone MOV to MP4, MP4 to MOV, M4V to MP4, and more.
- [Free Online Screen Recording Editor & Product Video with Zoom Effects · Screen Studio / Cap / Cursorful Alternative](https://metool.online/videos/screenEditor/): Free screen recording editor with zoom effects for product demos. Trim, speed ramp, silence removal, macOS wallpaper backgrounds. Screen Studio / Cap / Cursorful alternative — browser-based, no install, 100% private.
- [Free Online Video Editor · Cut, Crop, Speed, Silence Removal — No Install](https://metool.online/videos/videoEditor/): Free browser-based video editor: CapCut-style timeline cutting, crop to any aspect ratio (9:16, 16:9, 4:3, 1:1), 0.25x–10x speed ramp, one-click silence removal, volume control. GPU-accelerated WebCodecs export. No install, 100% private.
- [Video to GIF Meme Maker · Text, Reverse, Crop Online](https://metool.online/videos/videoToGif/): Convert MP4/MOV/WebM to GIF with precise clip selection, text overlay for memes, reverse/boomerang effects, and spatial cropping. Customize FPS, colors, size — pure browser processing.
- [Free Online Audio Editor · Waveform Trim, Auto Silence Trim, Peak Normalize, MP3/WAV Export](https://metool.online/videos/audioEditor/): Edit audio in the browser: waveform trimming, optional auto trim silence / trim ends / peak normalize after upload, fade handles, silence detection, MP3 or WAV export. Files stay on your device.
- [Subtitle Format Converter — SRT ↔ VTT ↔ ASS ↔ SBV ↔ LRC](https://metool.online/videos/subtitleConvert/): Free online subtitle converter: turn SRT into VTT for HTML5 video, convert ASS subtitles to SRT for any player, batch convert dozens of files at once. Runs entirely in your browser — files never leave your device.
- [Subtitle Sync & Timing Fix — Offset, Anchor, Frame-rate Conversion](https://metool.online/videos/subtitleSync/): Fix out-of-sync subtitles in seconds: shift the whole file by ±N ms, anchor the first and last cue to known timestamps for linear stretch, or rescale 23.976/24/25/29.97/30/60 fps. SRT, VTT, ASS, SBV, LRC supported.
- [Online Subtitle Editor — Visual Timeline + Live Video Preview](https://metool.online/videos/subtitleEdit/): Edit SRT, VTT, ASS, SBV, LRC subtitles with a visual timeline and live video preview. Drag cues to retime, edit text inline, split or merge lines, then export back to any format. Pure browser, no upload.

## Magic Tools

- [Online Lottery & Raffle Tool · One-Click Fair Random Drawing, Bulk Import](https://metool.online/magics/lottery/): Company party, event, classroom - launch lottery instantly. Batch import names, repeat drawing, save results. Completely fair, impossible to cheat. Everyone trusts the outcome.
- [Heartbeat Romantic Effect · Free Online Love Confession Animation for Valentine's Day](https://metool.online/magics/heartBeat/): Add warmth to special moments. Valentine's Day, birthday, anniversary - beating hearts, colorful fireworks, warm words. Confess, celebrate, thank, wish - all on one page.
- [Qingming Memorial Page Online · Free Tribute to Ancestors, Virtual Remembrance](https://metool.online/magics/qingming/): Solemn memorial space recording thoughts of the departed. Simple, respectful design, warm words, eternal remembrance for family and friends.

## Online Games

- [Chinese Chess AI Online · Free Xiangqi vs AI - Play in Browser](https://metool.online/games/chineseChess/): Play Chinese Chess (Xiangqi) against AI in your browser. Three difficulty levels, full rules including cannon, horse blocking and river crossing. No download needed.
- [Chess AI Online Free · Play Chess vs AI in Browser - No Download](https://metool.online/games/internationalChess/): Play Chess against AI directly in your browser. Three difficulty levels, full rules including castling, en passant and pawn promotion. No download or signup needed.
- [Free Online Go Game AI · Play Go Against AI - 9x9, 13x13, 19x19 Board](https://metool.online/games/go/): Free online Go (Weiqi/Baduk) game with intelligent AI opponent. Play on 9x9, 13x13, or 19x19 boards with multiple difficulty levels. No download needed - play Go directly in your browser on desktop or mobile. Exercise strategic thinking and experience the ancient art of Go.
- [Free Online Gomoku Game AI · Play Five in a Row Against AI](https://metool.online/games/gomoku/): Free online Gomoku (Five in a Row) game with powerful AI opponent. Three difficulty levels from beginner to expert. No download needed - play directly in your browser on desktop or mobile. Challenge the AI anytime, anywhere.
- [Aeroplane Chess (Ludo) Online · Free Browser Game, Play vs AI, No Download](https://metool.online/games/aeroplaneChess/): Free online Aeroplane Chess (Ludo) game — the classic board game with four colors. Roll the dice, move your pieces around the track, and race to bring all 4 tokens home before your AI opponents. No download, no registration. Works on desktop and mobile.
- [Chinese Checkers AI Online · Play vs 1-5 AI Opponents, Free Star-Board Game No Download](https://metool.online/games/chineseCheckers/): Free online Chinese Checkers on a classic star-shaped board with 6-color marbles. Play against 1-5 AI opponents at Easy, Medium, or Hard difficulty. Canvas-rendered 3D marble effects, works on desktop and mobile. No download needed — jump into Chinese Checkers AI matches right in your browser.
- [Reversi Othello AI Game Online · Play vs AI, Free Browser Strategy Game No Download](https://metool.online/games/reversi/): Classic Reversi (Othello) board game online. Challenge an AI opponent at three difficulty levels — Easy, Medium, or Hard. Flip enemy pieces and dominate the board. No download or sign-up needed — play Reversi AI directly in your browser.
- [Go Tsumego Puzzles Online · Free Life and Death Problems, Improve Your Go Strength](https://metool.online/games/tsumego/): Practice Go (Weiqi/Baduk) life and death problems online for free. 20 carefully crafted tsumego puzzles from beginner to intermediate. Interactive board, instant feedback, hints and answers. Improve your Go reading skills in your browser.
- [Sudoku Online · Easy / Medium / Hard, Free to Play](https://metool.online/games/sudoku/): Free online Sudoku with three difficulty levels. Auto error-check, pencil notes, hints and undo built in. Runs 100% in your browser — no sign-up, no data uploaded.
- [Sliding Puzzle Online · Free Number Tile Game, 3x3 to 5x5 No Download](https://metool.online/games/slidingPuzzle/): Classic sliding puzzle (15-puzzle). Slide tiles into order. Supports 3×3, 4×4, 5×5 sizes with timer and move counter.
- [Numberlink Puzzle Online · Free Connect Numbers Puzzle Game No Download](https://metool.online/games/numberlink/): Numberlink logic puzzle. Connect matching number pairs with paths that don't cross. Fill every cell. Multiple difficulty levels.
- [Rubik's Cube Online · Free 3D Browser Puzzle Game, 2x2 to 5x5 No Download](https://metool.online/games/rubiksCube/): Play a 3D Rubik's Cube online. Cute Q-style design, drag to rotate view, swipe to turn layers. Scramble, solve, and track your moves.
- [Duck Maze Adventure Online · Collect Fruits & Solve Puzzles, Free Browser Game](https://metool.online/games/maze/): Guide an adorable duck through randomly generated mazes! Collect fruits scattered throughout — each one triggers a cute eating animation. Once full, find the hidden bed to sleep and complete the level. 4 difficulty modes, unlimited levels, hand-drawn style. Keyboard and touch controls supported.
- [Minesweeper Online — Free Classic Game · Play Instantly, No Download](https://metool.online/games/minesweeper/): Play Minesweeper online instantly — no download, no sign-up. Choose Beginner (9×9), Intermediate (16×16) or Expert (30×16). Left-click to reveal, right-click to flag. Beat your best time and clear all the mines. Works on mobile and desktop.
- [Sokoban · Free Online Classic Box-Pushing Puzzle](https://metool.online/games/sokoban/): Classic Sokoban puzzle online with 20+ hand-crafted levels. Push each box onto a target spot using arrow keys or swipe. Undo and restart supported. Pure frontend, no download required.
- [Memory Match Card Game Online · Free Brain Training Puzzle No Download](https://metool.online/games/memoryMatch/): Memory card matching game. Flip cards to find matching pairs. Multiple board sizes, timed challenges. Train your memory!
- [Lianliankan Tile Matching Game Online · Free Classic Puzzle No Download](https://metool.online/games/lianliankan/): Classic Chinese Lianliankan (tile-matching) game online. Pick two identical tiles — if they can be connected with no more than three straight lines, they disappear. Multiple difficulties, built-in hint and shuffle. Plays on desktop and mobile.
- [Match-3 Candy Crush Style Game Online · Free Browser Puzzle No Download](https://metool.online/games/xiaoxiaole/): Classic match-3 candy puzzle game online. Swap adjacent candies to line up three or more of the same type — they burst and more fall in. Chain combos for bonus points. Runs entirely in your browser.
- [2048 Game Online · Play Free, No Ads, No Sign-up](https://metool.online/games/game2048/): Play 2048 online for free. Keyboard, touch, undo and leaderboard — everything runs in your browser, nothing uploaded. Slide tiles, merge numbers, reach 2048.
- [Classic Tetris Online · Free Browser Puzzle Game, No Download Required](https://metool.online/games/tetris/): Classic Tetris game, relive childhood memories. Supports keyboard and touch controls, scoring system, level progression, challenge high scores.
- [Classic Snake Game Online · Free Browser Puzzle, Multiple Speeds No Download](https://metool.online/games/snake/): Classic nostalgic Snake game to relive childhood memories. Easy to learn, supports keyboard and touch controls, challenge high scores suitable for all ages.
- [Flappy Bird · Free Online Pixel Bird Game](https://metool.online/games/flappyBird/): Classic Flappy Bird in your browser. Tap or press space to flap through the gaps between pipes and chase a new high score. Works on keyboard, mouse and touch. No download.
- [Play Breakout Online · Experience Classic 1976 Atari Arcade Game](https://metool.online/games/breakout/): Play Breakout online, experience the classic 1976 Atari arcade rules: 8 rows of color-coded bricks with increasing point values, dynamic speed-up, and a paddle-shrink penalty. Keyboard, mouse and touch supported, playable instantly in your browser.
- [Jump Jump Game Online · Free Casual Jumping Browser Game No Download](https://metool.online/games/jumpJump/): Hold to charge, release to jump onto the next platform. Perfect landings earn combo bonuses. Canvas-rendered isometric 3D view, pure frontend, no download needed.
- [Dino Jump Game Online · Free Browser Jumping Game No Download](https://metool.online/games/dinoGame/): Classic Google Chrome Easter egg pixel dinosaur jumping game. Tap or press space to jump over cacti and run as far as you can. Pure frontend, zero install, works on mobile and desktop.
- [Chinese Pool Online · Play 8-Ball Billiards vs AI, 3 Difficulty Levels Free](https://metool.online/games/taiqiu/): Free online Chinese Pool (8-ball billiards) with simplified Chinese-style rules — no call-shot required, just clear your group then pot the 8-ball. Play against a geometry-driven AI opponent with Easy/Medium/Hard difficulty. Drag to aim and set power with mouse or touch — no download needed.
- [Solar System in Hand · Online Gesture-Interactive Immersive 3D Universe Explorer](https://metool.online/games/solarInHand/): Innovative gesture-controlled solar system 3D visualization tool. Use camera to recognize gestures: fist to rotate universe, pinch to zoom view. Immersively explore the solar system's eight planets with unprecedented cosmic interaction.
- [Online Drum Kit Simulator · Play Real Drums by Touch on Phone & Tablet, Free](https://metool.online/games/drumKit/): Free online drum kit simulator. Tap on touchscreen or use your keyboard to hit kick, snare, hi-hat, toms, crash and ride with real recorded drum samples. Record and loop your grooves. Works on phone, tablet (iPad) and desktop browsers — no download, play real drums anytime.

## 3D Tools

- [Free Online GLB/GLTF 3D Model Viewer · No Software Needed](https://metool.online/3d/glbPreview/): Free online 3D model viewer supporting GLB and GLTF formats. Upload and preview instantly with 360° rotation, zoom, and animation controls. No Blender, Maya, or any software needed. Built for designers, game developers, and 3D printing enthusiasts.
- [Free Online STL Viewer · 3D Print File Preview, Rotate & Zoom No Install](https://metool.online/3d/stlViewer/): Free online STL file viewer for 3D printing. Upload and preview STL models with rotation, zoom, and model statistics. Check your 3D print files before slicing — no software needed.
- [Free Online FBX 3D Model Viewer · Animation Preview in Browser](https://metool.online/3d/fbxViewer/): Free online FBX viewer. Upload or load from URL to preview Autodesk FBX models with skeletal and camera animation playback, multiple animation clips, six standard views, and model stats export. Rendered locally in your browser.
- [Free Online USDZ/USD 3D Model Viewer · Browser Preview, No Install](https://metool.online/3d/usdzViewer/): Free online viewer for USDZ, USDA, USDC, and USD. Upload or load from URL, with orthographic-style view presets and model stats export. 100% local processing — ideal for AR pipelines and quick USD asset checks.
- [Free Online OBJ 3D Model Viewer · Wavefront OBJ File Preview](https://metool.online/3d/objViewer/): Free online OBJ file viewer for Wavefront 3D models. Upload and preview OBJ models with 360° rotation, zoom, and model statistics. No software needed — works directly in your browser.
- [Free Online 3D Model Format Converter · STL OBJ GLB USDZ PLY FBX DAE](https://metool.online/3d/modelConvert/): Free online 3D model format converter supporting STL, OBJ, GLB, GLTF, PLY, FBX, DAE input. Export to GLB, USDZ, STL, OBJ, PLY instantly in your browser. No upload to servers, 100% privacy protected.
- [Free Online 3D Model Optimizer · Decimate & Texture Resize, Export GLB](https://metool.online/3d/modelOptimizer/): Optimize GLB, GLTF, STL, OBJ, FBX in the browser: merge vertices, ratio-based triangle reduction, max texture size, preview, and download GLB. 100% local processing.
- [Free Online 3D Text Generator · Create 3D Text & Export GLB/STL](https://metool.online/3d/textTo3d/): Free online 3D text generator. Type text and instantly create 3D typography with customizable fonts, depth, bevel, materials, and colors. Export as GLB, STL, OBJ for 3D printing, web, and game development.

## AI Skills (CodeBuddy IDE Extensions)

- [whoami - Cross-AI Identity Sync · Let Every AI Know Who You Are](https://metool.online/skills/whoami/): Cross-AI user identity profile sync service. Create one profile and every AI agent — Cursor, Claude, Codex, Windsurf — instantly knows your name, skills, preferences, and work style.
- [Idea → MVP · AI-Powered Product Development Skill](https://metool.online/skills/idea2mvp/): A complete product development skill that guides you from inspiration discovery to idea validation and MVP implementation. Search trending products, validate feasibility, and build with your preferred tech stack.
- [Zhongjie · AI House-Buying Advisor](https://metool.online/skills/zhongjie/): Turn your AI assistant into an experienced house-buying advisor. Understand your needs through natural conversation, research properties from multiple sources, and display recommendations on an interactive browser dashboard.
- [GA & Search Improve · AI Website Analytics Optimization](https://metool.online/skills/gaImprove/): Analyze website data via Google Search Console and Google Analytics 4 APIs, automate site audits, and generate data-driven improvement reports with prioritized action items.

## LaTeX Tools

- [Free LaTeX Editor with Live Preview, No TeX Install, Open .tex Online](https://metool.online/latex/edit/): No TeX installation? Drag your .tex file into the browser and see it rendered instantly. Side-by-side live preview supports formulas, tables, and sections. Drafts auto-save locally; export to PDF, HTML, or PNG in one click. Free and private — nothing uploaded.
- [LaTeX Math Formula Editor Online, Live Preview & Export PNG/SVG](https://metool.online/latex/formula/): Type LaTeX math formulas with instant preview. Built-in symbol panel for Greek letters, integrals, and matrices — click to insert, no memorization needed. Export to high-res PNG or scalable SVG for PowerPoint, Word, and websites. Free, browser-only.
- [LaTeX to PDF / HTML / PNG Online Free Convert .tex Files in Browser](https://metool.online/latex/convert/): Upload or paste .tex source and convert to PDF (auto-paginated), self-contained HTML, PNG image, or download the .tex source — in one click. No TeX installation needed. Supports formulas, tables, and sections. 100% browser-local, nothing uploaded.
- [Share LaTeX Online — Rendered Preview Link, No TeX Needed for Recipients](https://metool.online/latex/share/): Paste or upload .tex source and generate a shareable rendered-preview link. Recipients open it in any browser with no LaTeX installation required. Links valid for {0} days. Perfect for sharing thesis drafts, formula notes, and TeX documents.

## HTML Tools

- [HTML Drag Edit — Online Edit AI HTML Without Code, Click to Edit & Drag](https://metool.online/html/editor/): Upload any HTML and edit it visually: click elements to rewrite text, change fonts and colors, swap images (embedded as base64), drag to reorder, undo/redo, find & replace — no code. Built for non-coders polishing AI-generated HTML. 100% browser-local, nothing uploaded.
- [HTML Live Preview Online — Render AI HTML Instantly, No Setup](https://metool.online/html/preview/): Paste or upload HTML and see it rendered live, with mobile / tablet / desktop viewports and screenshot export (PNG / JPG / PDF). Perfect for previewing AI-generated HTML. Runs entirely in your browser; nothing uploaded.
- [Share HTML Online — Generate a Link for AI HTML, Valid {0} Days](https://metool.online/html/share/): Upload HTML and generate a shareable link recipients open in any browser — no install. Small files compress into the link; larger files use a third-party temporary store with your consent. Links valid for {0} days. Great for sharing AI-generated pages, reports and prototypes.